/* eslint-disable */
export const sum = (a, b) => {
    return a + b;
}
export const cheng = (a, b) => {
    return a * b;
}

// ES6 moudle  才支持tree-shaking 
// commonjs 不不支持

























export const mult = (a, b) => {
    return a * b
}

// ES6 Module 才能让 tree-shaking 生效
// commonjs 就不行
